421842496547 has 4 divisors (see below), whose sum is σ = 425164091136. Its totient is φ = 418520901960.

The previous prime is 421842496541. The next prime is 421842496561. The reversal of 421842496547 is 745694248124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421842496547 - 2²⁰ = 421841447971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421842496492 and 421842496501.

It is not an unprimeable number, because it can be changed into a prime (421842496541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660797104 + ... + 1660797357.

It is an arithmetic number, because the mean of its divisors is an integer number (106291022784).

Almost surely, 2^421842496547 is an apocalyptic number.

421842496547 is a deficient number, since it is larger than the sum of its proper divisors (3321594589).

421842496547 is a wasteful number, since it uses less digits than its factorization.

421842496547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321594588.

The product of its digits is 15482880, while the sum is 56.

The spelling of 421842496547 in words is "four hundred twenty-one billion, eight hundred forty-two million, four hundred ninety-six thousand, five hundred forty-seven".